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Tspi_TPM_GetCapability(3)			     Tspi_TPM_GetCapability(3)

		   TCG Software Stack Developer's Reference

NAME
       Tspi_TPM_GetCapability - get information on the capabilities of the TPM

SYNOPSIS
       #include <tss/platform.h>
       #include <tss/tcpa_defines.h>
       #include <tss/tcpa_typedef.h>
       #include <tss/tcpa_struct.h>
       #include <tss/tss_typedef.h>
       #include <tss/tss_structs.h>
       #include <tss/tspi.h>

       TSS_RESULT Tspi_TPM_GetCapability(TSS_HTPM hTPM,		     TSS_FLAG capArea,
					 UINT32	  ulSubCapLength,    BYTE*    rgbSubCap,
					 UINT32*  pulRespDataLength, BYTE**   prgbRespData);

DESCRIPTION
       Tspi_TPM_GetCapability  gets information on various capabilities of the
       TPM. This command can be used to learn how many PCRs the TPM  supports,
       etc.

PARAMETERS
   hTPM
       The hTPM parameter is used to specify the handle of the TPM object.

   capArea
       The  capArea  parameter	is the flag indicating the attribute to query.
       Possible values are:

   ulSubCapLength
       The ulSubCapLength parameter is the length in bytes  of	the  rgbSubCap
       parameter.

   rgbSubCap
       The  rgbSubCap parameter is the data indicating the attribute to query.
       Possible values are:

   pulRespDataLength
       The pulRespDataLength parameter is the length in bytes of the prgbResp‐
       Data parameter.

   prgbRespData
       The prgbRespData parameter receives a pointer to the actual data of the
       specified attribute.

NOTES
       The following Capability Areas and Sub-Capability Areas	are  supported
       by 1.1 TSS's:

       TSS_TPMCAP_ORD - query whether an ordinal is supported by the TPM.
	       subCaps: TPM_ORD_* (see tcpa_literals.h)

       TSS_TPMCAP_FLAG	- query for the volatile and non-volatile flags inside
       the TPM. (Must be owner authorized). In this case, the 2 UINT32	values
       will be returned concatenated together in prgbRespData.
	       subCaps: ignored.

       TSS_TPMCAP_ALG - query whether an algorithm is supported by the TPM.
	       subCaps: TSS_ALG_RSA
			TSS_ALG_DES
			TSS_ALG_3DES
			TSS_ALG_SHA
			TSS_ALG_HMAC
			TSS_ALG_AES

       TSS_TPMCAP_PROPERTY - query a property of the TPM.
	       subCaps: TSS_TPMCAP_PROP_PCR
			TSS_TPMCAP_PROP_DIR
			TSS_TPMCAP_PROP_MANUFACTURER
			TSS_TPMCAP_PROP_SLOTS

       TSS_TPMCAP_VERSION  -  get the TSS_VERSION structure tha identifies the
       TPM.
	       subCaps: ignored.

RETURN CODES
       Tspi_TPM_GetCapability returns TSS_SUCCESS on success, otherwise one of
       the following values is returned:

       TSS_E_INVALID_HANDLE
	      hTPM is not a valid handle.

       TSS_E_INTERNAL_ERROR
	      An internal SW error has been detected.

       TSS_E_BAD_PARAMETER
	      One or more parameters is bad.

CONFORMING TO
       Tspi_TPM_GetCapability conforms to the Trusted Computing Group Software
       Specification version 1.1 Golden

SEE ALSO
       Tspi_TPM_GetCapabilitySigned(3), Tspi_TPM_GetEvent(3).

TSS 1.1				  2004-05-25	     Tspi_TPM_GetCapability(3)

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